Sentences with phrase «series by its standard deviation»

Mannian PC methodology divides each series by its standard deviation in the calibration period.

Not exact matches

NCLB has a fairly simple structure: states were required to develop learning standards along with consistent assessments of student accomplishment of these standards; schools were required to be on a glide path to get all of their students up to a state - defined proficiency level by 2013; and the federal government established a series of corrective actions — including provision of supplemental services, broad student choice, and reconstitution — that were required of individual schools after continual deviation from this glide path.

Exit when the price is moving rapidly into an overextended technical state, often identified by a series of vertical bars on the 60 - minute chart or price piercing the third or fourth standard deviation of a top or bottom 20 - day Bollinger Band.

Another way to look at the results of the AAII screens is to calculate compound annual returns divided by standard deviation for each series of results from 1998 to 2012.

The Sharpe ratio is calculated for a time series by dividing the mean period return (daily, monthly, yearly), in excess of the risk free rate, by the standard deviation of such returns.

The proxy series and PCs were formed into anomalies relative to the same 1902 — 80 reference period mean, and the proxy series were also normalized by their standard deviations during that period.

The «noise level,» that is, the amplitude of internal variability, approximated here by the standard deviation (σ) of the OHC time series after the linear trend is removed, amounts to 0.77 × 1022 J from 2004 to 2015 (Table 1).

For a Gaussian time series, the margin of error on a trend of length N t estimated by linear least - squares regression is a function of the magnitude of the interannual variability (given by the standard deviation σ), the lag - one autocorrelation and the trend length (Thompson et al. 2015).

From the tree ring width differences one can see that the variations are influenced by the younger tree ring ages being bigger and tending to give a larger standard variation, but not entirely as the smaller older tree rings in some of the trees from the second half of the difference series had standard deviations larger than the younger larger rings from the first half of the difference series..

To avoid these two artificial parameters, as a final step we have standardized the quantities by subtracting the mean and dividing by the standard deviation of each series shown, for the whole period 1909 - 2003.»

All series were standardized by subtracting the mean and dividing by the standard deviation of each series shown for the period 1971 - 2000.»

These range from simple averaging of regional data and scaling of the resulting series so that its mean and standard deviation match those of the observed record over some period of overlap (Jones et al., 1998; Crowley and Lowery, 2000), to complex climate field reconstruction, where large - scale modes of spatial climate variability are linked to patterns of variability in the proxy network via a multivariate transfer function that explicitly provides estimates of the spatio - temporal changes in past temperatures, and from which large - scale average temperature changes are derived by averaging the climate estimates across the required region (Mann et al., 1998; Rutherford et al., 2003, 2005).

All time series were normalized by their standard deviation.